Messenger fixes (#73503)

## About The Pull Request

- Photos now show up in the chat to the person recieving them as a
(Photo) like how it used to be
- Outgoing messages now properly say who it's outgoing to, instead of
saying it's to themselves.
- Messenger now clears photos after sending an image with them, so you
don't accidentally send the same photo 50 times.
- AIs can now send an image from the messenger menu (code stolen from
https://github.com/BeeStation/BeeStation-Hornet/pull/7550)
- Added a balloon alert when you uploaded a photo so it doesn't just
silently pass and you have no idea if it worked or not.

## Why It's Good For The Game

Closes https://github.com/tgstation/tgstation/issues/70140 - an issue
report I've had open for months and kept procrastinating on working on.
Closes https://github.com/tgstation/tgstation/issues/70264

Messenger now properly works as it was originally supposed to.

## Changelog

🆑 JohnFulpWillard and itsmeow
fix: Messenger now clears photos after you send it, so you don't send a
photo repeatedly until you manually clear it.
fix: Sending a photo now has a hyperlink in chat for the target to see
(like with old PDAs)
fix: AIs can now select photos in their Messenger app.
fix: Messenger no longer says you're sending outgoing messages to
yourself.
/🆑

code/modules/modular_computers/file_system/programs/ntmessenger.dm

@@ -54,6 +54,7 @@
 	var/obj/item/photo/pic = attacking_item
 	saved_image = pic.picture
 	ProcessPhoto()
+	user.balloon_alert(user, "photo uploaded")
 	return TRUE
 
 /datum/computer_file/program/messenger/proc/ScrubMessengerList()
@@ -196,6 +197,19 @@
 			sending_virus = !sending_virus
 			return UI_UPDATE
 
+		if("PDA_selectPhoto")
+			if(!issilicon(usr))
+				return
+			var/mob/living/silicon/user = usr
+			if(!user.aicamera)
+				return
+			var/datum/picture/selected_photo = user.aicamera.selectpicture(user)
+			if(!selected_photo)
+				return
+			saved_image = selected_photo
+			ProcessPhoto()
+			return TRUE
+
 /datum/computer_file/program/messenger/ui_static_data(mob/user)
 	var/list/data = ..()
 
@@ -292,7 +306,8 @@
 		"ref" = REF(computer),
 		"targets" = targets,
 		"rigged" = rigged,
-		"photo" = photo_path,
+		"photo" = saved_image,
+		"photo_path" = photo_path,
 		"automated" = FALSE,
 	))
 	if(rigged) //Will skip the message server and go straight to the hub so it can't be cheesed by disabling the message server machine
@@ -319,7 +334,9 @@
 	message_data["contents"] = html_decode(signal.format_message())
 	message_data["outgoing"] = TRUE
 	message_data["ref"] = signal.data["ref"]
+	message_data["photo_path"] = signal.data["photo_path"]
 	message_data["photo"] = signal.data["photo"]
+	message_data["target_details"] = signal.format_target()
 
 	// Show it to ghosts
 	var/ghost_message = span_name("[message_data["name"]] </span><span class='game say'>[rigged ? "Rigged" : ""] PDA Message</span> --> [span_name("[signal.format_target()]")]: <span class='message'>[signal.format_message()]")
@@ -347,6 +364,8 @@
 		last_text_everyone = world.time
 
 	messages += list(message_data)
+	saved_image = null
+	photo_path = null
 	return TRUE
 
 /datum/computer_file/program/messenger/proc/receive_message(datum/signal/subspace/messaging/tablet_msg/signal)
@@ -357,6 +376,7 @@
 	message_data["outgoing"] = FALSE
 	message_data["ref"] = signal.data["ref"]
 	message_data["automated"] = signal.data["automated"]
+	message_data["photo_path"] = signal.data["photo_path"]
 	message_data["photo"] = signal.data["photo"]
 	messages += list(message_data)
 
@@ -382,8 +402,8 @@
 		inbound_message = emoji_parse(inbound_message)
 
 		if(L.is_literate())
-			to_chat(L, "<span class='infoplain'>[icon2html(src)] <b>PDA message from [hrefstart][signal.data["name"]] ([signal.data["job"]])[hrefend], </b>[inbound_message] [reply]</span>")
-
+			var/photo_message = message_data["photo"] ? " (<a href='byond://?src=[REF(signal.logged)];photo=1'>Photo</a>)" : ""
+			to_chat(L, span_infoplain("[icon2html(computer)] <b>PDA message from [hrefstart][signal.data["name"]] ([signal.data["job"]])[hrefend], </b>[inbound_message][photo_message] [reply]"))
 
 	if (ringer_status)
 		computer.ring(ringtone)